/* =========================================
   1. VARIABLES & RESET
   ========================================= */
:root {
  --color-bg: #0b1220;
  --color-surface: #111d2e;
  --color-surface-glass: rgba(17, 29, 46, 0.65);
  --color-emerald: #059669;
  --color-emerald-light: #10b981;
  --color-emerald-glow: rgba(16, 185, 129, 0.4);
  --color-blue-deep: #0f172a;
  --color-blue-accent: #0ea5e9;
  --color-cyan: #06b6d4;
  --color-cyan-light: #22d3ee;
  --color-cyan-glow: rgba(6, 182, 212, 0.45);
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-white: #ffffff;
  --font-body: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.35);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

address {
  font-style: normal;
}

/* =========================================
   2. UTILITIES
   ========================================= */
.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

.glass {
  background: var(--color-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-glass);
}

.section {
  padding: 6rem 0;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================
   3. NAVIGATION
   ========================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--transition), box-shadow var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-emerald), var(--color-cyan));
  color: var(--color-white);
  font-size: 1.4rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 18px var(--color-emerald-glow);
}

.logo-title {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-white);
  line-height: 1.1;
}

.logo-subtitle {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-cyan-light);
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-emerald-light), var(--color-cyan-light));
  transition: width var(--transition);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-white);
  outline: none;
}

.nav-link:hover::after,
.nav-link:focus::after {
  width: 100%;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

/* =========================================
   4. HERO SECTION
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(ellipse at 20% 20%, rgba(16,185,129,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 80%, rgba(6,182,212,0.12) 0%, transparent 50%),
              linear-gradient(180deg, var(--color-blue-deep), var(--color-bg));
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15,23,42,0.25) 0%, rgba(6,78,59,0.35) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 8rem 0 4rem;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-cyan-light);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 999px;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-white);
  text-shadow: 0 0 40px rgba(6, 182, 212, 0.25);
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 2.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-emerald), var(--color-cyan));
  color: var(--color-white);
  box-shadow: 0 0 24px var(--color-emerald-glow), 0 0 48px rgba(6, 182, 212, 0.15);
}

.btn-primary:hover {
  box-shadow: 0 0 32px var(--color-emerald-glow), 0 0 64px rgba(6, 182, 212, 0.25);
}

.btn-submit {
  background: linear-gradient(135deg, var(--color-emerald), var(--color-emerald-light));
  color: var(--color-white);
  box-shadow: 0 0 20px var(--color-emerald-glow);
  width: 100%;
}

/* Floating Data Panels */
.hero-data-panels {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.data-panel {
  position: absolute;
  background: rgba(6, 182, 212, 0.08);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  box-shadow: 0 0 24px rgba(6, 182, 212, 0.1);
  animation: float 7s ease-in-out infinite;
}

.data-value {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-cyan-light);
  text-shadow: 0 0 10px var(--color-cyan-glow);
}

.data-label {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.15rem;
}

.panel-1 {
  top: 22%;
  left: 8%;
  animation-delay: 0s;
}

.panel-2 {
  top: 18%;
  right: 10%;
  animation-delay: 2s;
}

.panel-3 {
  bottom: 22%;
  right: 12%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}

/* =========================================
   5. SECTION HEADER
   ========================================= */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-emerald-light);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 1rem;
  line-height: 1.15;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

/* =========================================
   6. ABOUT SECTION
   ========================================= */
.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.about-card {
  padding: 2rem;
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition);
}

.about-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.3);
}

.about-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
  margin-top: 1.25rem;
}

.about-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(6,182,212,0.15), rgba(16,185,129,0.15));
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-sm);
  color: var(--color-cyan-light);
}

/* =========================================
   7. PROGRAMS SECTION
   ========================================= */
.programs {
  background: linear-gradient(180deg, var(--color-bg), rgba(16,185,129,0.04), var(--color-bg));
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.program-card {
  position: relative;
  background: linear-gradient(135deg, rgba(17,29,46,0.9), rgba(15,23,42,0.95));
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 2.5rem;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.program-card:hover {
  border-color: rgba(6, 182, 212, 0.35);
  transform: translateY(-4px);
}

.program-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-emerald), var(--color-cyan));
  opacity: 0.6;
}

.program-number {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  font-size: 3.5rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1;
  user-select: none;
}

.program-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.program-card p {
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.6;
  font-size: 0.95rem;
}

.program-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-cyan-light);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap var(--transition), text-shadow var(--transition);
}

.program-link:hover {
  gap: 0.7rem;
  text-shadow: 0 0 12px var(--color-cyan-glow);
}

/* =========================================
   8. ENVIRONMENT LAB
   ========================================= */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  border-radius: var(--radius);
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(6, 182, 212, 0.2);
}

.project-header {
  padding: 1.5rem 1.75rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.project-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
}

.project-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.75rem;
  background: rgba(16, 185, 129, 0.12);
  color: var(--color-emerald-light);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 999px;
  white-space: nowrap;
}

.project-body {
  padding: 1.25rem 1.75rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex-grow: 1;
}

.project-meta,
.project-features {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.project-meta strong,
.project-features strong {
  color: var(--color-cyan-light);
  font-weight: 600;
}

/* =========================================
   9. CONTACT SECTION
   ========================================= */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  border-radius: var(--radius);
  padding: 3rem;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-info h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 2rem;
}

.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-sm);
  color: var(--color-cyan-light);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.1);
}

.contact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.contact-list a,
.contact-list address {
  color: var(--color-text);
  font-size: 0.95rem;
  transition: color var(--transition);
}

.contact-list a:hover,
.contact-list a:focus {
  color: var(--color-cyan-light);
  outline: none;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.85rem 1rem;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(148, 163, 184, 0.6);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15), 0 0 16px rgba(6, 182, 212, 0.15);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2394A3B8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  cursor: pointer;
}

.form-group select option {
  background: var(--color-surface);
  color: var(--color-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* =========================================
   10. FOOTER
   ========================================= */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(11, 18, 32, 0.9);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-location {
  color: var(--color-cyan);
  font-weight: 600;
}

/* =========================================
   11. SCROLLBAR
   ========================================= */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-emerald), var(--color-cyan));
  border-radius: 5px;
}

/* =========================================
   12. RESPONSIVE DESIGN
   ========================================= */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .lab-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
    z-index: 1100;
  }

  .nav-list {
    position: fixed;
    top: 72px;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: calc(100vh - 72px);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(11, 18, 32, 0.98);
    backdrop-filter: blur(16px);
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    padding: 2rem;
    transition: right 0.35s ease;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.4);
  }

  .nav-list.active {
    right: 0;
  }

  .nav-list li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-link {
    display: block;
    padding: 1rem 0;
    font-size: 1.05rem;
  }

  .mobile-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
  }

  .mobile-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg);
    top: 0;
  }

  .mobile-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
  }

  .hero-data-panels {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .programs-grid {
    grid-template-columns: 1fr;
  }

  .lab-grid {
    grid-template-columns: 1fr;
  }

  .contact-wrapper {
    padding: 2rem 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding-top: 6rem;
  }

  .section {
    padding: 4rem 0;
  }

  .about-card,
  .program-card,
  .project-card {
    padding: 1.5rem;
  }

  .contact-wrapper {
    padding: 1.5rem;
  }
}